This is because you can deliver the power to an electrical appliance over three power lines instead of one.
Is 3 phase electricity more expensive.
Your power supplier looks on all 3 phases and the current power you need on them.
But otherwise agree with everyone you are billed on kwh consumed not the type of wiring.
The cost of electricity for electric motor three phase operation is based on the kilowatt hours used just like any other electrical device.
Three phase electricity per watt delivered is cheaper than single phase.
In contrast three phase power has four wires three of which are active in addition to one neutral wire which is once again earthed at the switchboard.
So you will have three times more current on one phase than on a 3 phase system on one.
One of which is that most homes use it it s the power present in wall plugs.
I recently moved my shop and in addition to the big issues from forklift rental to sleep deprivation we also had to deal with things like three phase power a variation of power delivery often.
Single phase power is used in most homes and small businesses because it is relatively simple and inexpensive to install.
Three phase electric power is a common method of alternating current electric power generation transmission and distribution.
Commercial and industrial businesses with greater electricity needs prefer three phase power because it is more efficient and less expensive to operate.
A three wire three phase circuit is usually more economical than an equivalent two wire.
3 phase a c is obviously connected to all 3 phases and is marginally more efficient than a single phase unit of the same output.
Three phase electricity is common in both larger homes and businesses and allows for smaller less expensive wiring and lower voltages.
Single phase is more widely available in residential settings and is less expensive to purchase than three phase power units.
The only additional cost of 3 phase is the initial connection more cores more cost.
However figuring power usage is more complicated because the conventional equation for power usage must be modified to apply to three phase motors.
Begingroup if you need high power you should take the 3 phase system like you said 2kw motor for low power devices you should take the single phase because you have lower costs for converting it into dc for example.
